Mixer.



C. ENDORP,v JP.

l MIXER. APPLICATION FILED JUNE 24, 1912.

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wf" 'd 'I SEEE: Liu/ E mm '072621295 db 1f (LENDORF, JR." MIXER.

APPLIOATION FILED JUNE 24, 1912.

1,068,994, Patented July 29, 1913 2 SHEETS-SHEET I 'EEE-EE' mj :1% 0 wiefia/0 Unirnn sTATEs onnion.

cHAnLEs Ermont,- n., or o' tenso, I'Lnnois, li-ss'reivcn "ro LrN's'rnoM,SMITH co., A*

c'eronhrrolv or 'ILLINoIs auna.

Patented July 29, i913.

Application l'ed AJune .24, 1912. Serial N o. $05,449.`

' To all lwhom z'lf may concern.'

Be it known that I, CHARLES ENDOR'F, Jr., a citizen of the UnitedStates, and a resident of the city of Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inMixers;- and I do lhereby declare ,that the following'is a full, clear,Aand exact descriv tion of the same, reference being had to t eaccompanying drawings, a'nd to the numbers of reference marked thereon,which form a part of this specification.

This invention relates to that class of mixing devices adapted for usein stirring, agitating and mixing liquids; for example, in thepreparation of beverages and the like. Many devices of the kind haveheretofore been constructed, most of which have been complicated inconstruction and therefore expensive to maintain, and when motor drivenhave usually consumedconsiderable current for the work performed.

The object of this invention is to alford an exceedingly simple andpractical Adevice of ythe class described, wherein a single motor may beused to operate one, or a battery, of any desired number' of saidldevices in a manner to permit any of the same to be op erated withoutthe necessity of bringing the remaining mixing devices into operation.

It is alsoan object of the invention to afi ford means bwhereby thecurrent is auto'- iiiatically cut off by the return of the mixing meansto normal after each operation, and cut in when the mixing means arebrought into operative posit-ion.

It is also an object of the invention to afford an improved mixing headadapted to produce rapid circulation and movement in the liquid, andaffording a ce'ntral, downward vortex therein to thoroughly mix thesame. V

The invention (in its preferred form) 1s i illustrated in the drawings,and hereinafter Fig. 5 is a section on line 5 5 of y Fig. 3. Fig. 6 is areducedsection on'line 6--6 of Fig. 2. Fig. 7,is atop plan view 'of Ithe gear train, with other parts removed.

Fig. 8 is a side elevation of the mixing headl showing the saine removedfrom the shaft. Fg.9 is a bottom plan view thereof.

As shown in the drawings: l, indicates -,a

suitable weighted base, having an upright standard 2, mounted thereonand extending a suitable height above the same. v Secured on saidstandard 2;, is a transverse bar 3, of

any desired length, and having` a central sleeve or collar 4, therein toreceive said 'standard 2, said collar having rearwardly directedparallel arms 5, engaged a clamping set lscrew 6, to permit said-bar tobe adjusted vertically on the )standard 2, to

suit the height of one of the lasses 7, shown in dotted lines in Fig. l.n the forward side of said standard are forwardly projecting arms 8, onopposite sides of which are secured spring clamps 9, adapted to engagethe glass 7, therebetween, as shown/in Fig. 1. Slidably secured on saidstandard Vv'2, is a split sleeve 10, having a clamping member or leveredset screw 11, engaged therein to rigidly engage the same upon thestandard, as shown in Fig. 2. Secured on the forward side of saidsleeve, is an arm 12, having at its extremity a split clamping collar13, to receive thereina part of the casing 14, of an electric motor, andto rigidly engage and support the same, clamping l bolts 15, engagingthrough the .split ends of said collar for that purpose.

Secured on the .lower end of the shaft 16',l

'of the motor, is a spur gear 17, and meshing 90 therewith at theforward side of the machine, is a similar spur gear 18, and disposed oneach side thereof, are spur gears 19 and 20, any number of which may beemployed, dependent upon the'number of 95 mixingheads to be employed inthe battery. Each of the laterally disposed gears 19 and 20, isyprovided with an upwardly directed hub, provided with upwardlyprojecting ratchet teleth 21.

an upper anddownwardly flangedcomplemental plate 23, incloses all ofsaid gears and at each side of the moto-r is provided with upwardlyextending sleeves 24, con- 105 posed flanges, 26, shaped yto tit and tobe 11o A gear casing comprising a lower, flat, suitably shaped plate 22,and

`rigidly attached to the motor casing, and

vsaid shaft in the sleeve 24, is a downwardly facing clutch member 32,complemental with the hub clutch on the corresponding gear and adaptedto engage therewith to rotate they shaft thereby. Said shaftis of alength to extend the desired.` distance above the cap 28. Secured on theupper end of said shaft, is a hand piece or button 33, for manualengagement, and bearing at one end against said cap piece 28, and at theother beneath said hand piece, 33, is a spiral pushing' spring 34,through which .said shaft extends axially, and which acts normally tohold the shafts elevated, as shown in Fig. 4. Secured also on Asaid,shaft, and extending from said hand piece downwardly, is a sleeve 35, ofsuitable length. to limit the downward movement of the shaft (byengagement on the capv piece) just sufficient to engage the clutch. Asshown, a spring clutch is provided to hold the shaft in engagement withthe before mentioned clutch when in operative position. For thispurpose, the shaft 31, is provided with a peripheral groove aifordf ingan upwardly facing shoulder 36, ata point adapted to lie`just within thecap piece 28, when, the aforesaid clutches are in driving position, anda pin 37, transversely slidable through said cappiece, engages thereinto hold the shaft in driving position until released. The outer end-ofsaid pin or bolt lis secured to a leaf spring 38, providedwith a lever39, formanual engagement" to permit retraction thereof.

' Secured on the lower end of each of said shafts 31, isgla mixing head.This, as shown, comprises a round or substantially ball shaped headportion 40, and a stem 41, which may be' threaded for engagement on saidshaft, though, of course, the head may be engagediherein` in anysuitable manner. Said head is provided circumferentiallyvandhorizontally with a groove 42,

`and below said groove with downwardly converging obliquely arrangedgrooves 43, which may be of any desired number, and which serve whilerotating, to produce a downwardly acting vortex in the liquid. Abovesaid circumferential groove are opi positely inclined grooves 44, whichact to produce further agitation in the liquid and toproduce an upwardldeflected current when'the shaft is rotate y Switches are provided to beoperated by movement of said shafts or any of them, and acting tomake'the motor circuit when one of the shafts is forced downwardly tooperative position, and 'to break the motor circuit when the shaft isreturned to normal. For this purpose, as shown, each of the sleeves 24,is slotted to afford an opening into the tubular bar or 'connection 25,as shown .,'in Figs. 4 and 5, and secured directly ,bnsaid sleeve at thebottom of said slot, and projecting upwardly and inwardly into bearingagainst said shaft above the clutch member 32, is a leaf spring 45, bentinwardly, and V shaped at its upperand free end to afford an inclinedcontact face directed upwardly and also downwardly. Secured parallel(but out of Contact) therewith, and insulated therefrom and from thesleeve, is a spring contact plate 46. Lead wires 47, are connected withsaid'spring contact member 46, adjacent each of said shafts andleadinwardly to one of /tle binding posts for the mo-tor to afford one ofthe mo-tor leads, and one of the lead wires connecting with the sourceof electrical supply,

is groundedat any convenient point on the machine.

The operation-tis as follows: The glassA holding clamps may, of course,be adjusted as to height ,to suit any desiredvheight of glass and thisalso is true of the machine as a whole, inasmuch as the motor and thepartsattached therewith may be adjusted upwardly or downwardly on thestandard 21, and rigidly secured in its adjusted po# siti-on by means'of the levered clamping element 11. When the machine is not in use theshafts are obviously at rest, inasmuch as r,the motor is out of circuit.When, however,

it is desired to use the device for mixing purposes, it isv onlynecessary to force the vappropriate shaft downwardly against thetensio-n of its spring with the effect of closj ing the switch just asthe clutch engages to drive the shaft from said gear and simultaneouslythe pin clutch 37, engages overr the shoulder 36, in said shaft andyholds the shaft in operative position until manually released. high rateof speed by the motor, the mixing head thereon producing a strongdownward vortex in the liquid, and also a cross and slightly upwardvortex to'more thoroughly mix, and, to an extent, aerate the contents ofthe glass or container. When sufficiently mixed, the pin clutch isretracted by means of the 1ever.39, and the shaft is raised to normalposition by the spring 34. As the insulated sleeve 30, is retracted fromthe leaf spring 45, the latter moves in-4 wardly, breaking the circuitat the switch.

From the construction described it is The shaft is now rotated at'a.

evident that one, or as many mixing shafts as desired, may be operatedsimultaneously or independently, and that any one of which whenactuated, serves to make or complete the motor circuit, to drive themachine, and all the shafts which are then in driving position, and thatsaid drive of the motor will be continued so long as one of said shaftsis at driving position, thereby assuring great economy in operation byrelieving the operator of the necessity of throwing a switch manuallyand by consuming only so much power as may be required at any giventime, or, in other words, varying the load upon the motor to the actualwork to be performed as the work varies.

Of course, details of construction may be varied. While I have shown thedevice embodied with a plurality of mixing shafts, it is to beunderstood that one, or any desired number may be used. I have shown butone (and that a preferred) construction embodying my invention. Itherefore do not purpose limiting the patent granted -on thisapplication otherwise than necessitated by the prior art.

I claim as my invention: f

1. A device of the class described embracing a .plurality of slidablymounted rotatable shafts, a motor,l means operated from the motor forrotating any of said shafts when in operative position, and a switchcontrollinoF the motor circuit and operated by the sliding of one ofsaid shafts, and acting to make the motor circuit when the shaft is atdriving position, and to'break the motor circuit when the shaft is inretracted position.

y2. A device of the class described embracing supporting means, a motoradjustably mounted thereon, a holding device -adjustably mounted thereonbelow the motor, shafts slidably 'and rotatably mounted to be drivensingly and simultaneously by the motor, means holding said shaftsnormally retracted from driving position, a switch for each shaft andcontrolling the motor circuit to break the motor circuit when the shaftis retracted and to 'make the mot-0r circuit when the shaft is atdriving position, and a manually operated detent or Vclutch forreleasing the shaft from driving position and simultaneously breakingthe circuit.

3. In a mixing device a standard or column, a motor adjustably mountedthereon, one or more shafts slidably supported and journaled on themotor frame, and substantially parallel said column, a gear on thearmature shaft, gears entrain therewith and through each of `which oneof said shafts slidably extends, a clutch member on each shaft, acomplemental clutch member therefor on the corresponding gear to drivesaid shaft when in driving position, a spring normally supporting eachshaft out of driving position, a manually releasable detent for each Ishaft to h old the same in adjusted driving position, and a switch foreach `shaft controlling the motor circuit acting to make the circuitwhen the shaft is depressed to driving position and to break the motorcircuit when rel'ea sed` therefrom.

4. In a device of the class described a motor, a battery of slidablymounted shafts, each and alladapted to be rotated by said motor whenslid to driving position, means on each shaft for retracting the samefrom driving position, and a switch adjacent-each shaft and controllingthe motor circuit, and acting to make the motor circuit when the shaftis at driving position, and to break the motor circuit when releasedfrom driving position.

5. yA device-of the class described embracing a motor, a gearwheeldriven thereby, other gears entrain therewith, an upwardly facing clutchhub on said gears, shafts slidably mounted in each of said gears, aclutch member thereon complemental with the corresponding'hub clutchmembers, a mixing head secured on the extremity of each shaft, means oneach shaft holding the same normally elevated out of mixingposition, anda A motor controlling switch mounted one at4 each shaft, and acting tomake the motor circuit when its shaft .is at mixing position, and tobreak the motor circuit when its shaft is released therefrom.

6. A mixing device of the class described embracing an adjustablysupported motor, a battery of mixing shafts slidably' supported on themotor frame and adapted to be driven by the motor, driving means foreach shaft operated from the motor, and switches in the motor circuit,one mounted adjacent each shaft and acting to make the motor circuitdrive the shaft when the shaft is adjusted to driving position, and tobreak the motor circuit whenA the shaft is released therefrom.

7. A device of the class described embracing a motor, a battery ofshafts mounted to be driven thereby, and each adjustable to and from/driving position, switches in the motor circuit, one arranged adjacenteach 11/5 shaft and acting to make the motor circuit lwhen the shaft isadjusted to driving position, and to break the motor circuit when theshaft is released therefrom, and entrain driving means for all of saidshafts, and entrain with the motor whereby one or any number of saidshafts may be operated simultaneously or independently by" the samemotor.` Y

8. A device of the class described' comprising a standard, a motor framerigidly but adjustably fixed thereon ,a motor and driven gears mountedtherein, sleeves secured on said frame, andmixing shafts slidabletherein and adapted to be rotated by izs said gears when moved downwardin said sleeves.4

9. A device of the class described comprising motor driven gears, mixingshafts slidable therethrough, complementary vclutch members on eachadapted to cause said shaftsto rotate with said gears, and electricalconnections causing rotation of said gears adapted to be actuated by thesliding of said shafts. 10. A device of the class described comprising aframe, a motor thereon, a mixing shaft driven thereby and slidablerelative thereto, and a switch for said motor operated by said shaftwhen moved downwardly.

11. In a device of the class described a` motor driven rotatable shaftandy a mixing head thereon having upwardly and downwardly directedrecesses therein adapted to churn a iuid in such directions simultaneously.

'12. In a device of the class described a mixing head comprising aspherical member having oppositely directed and converging recessestherein.

13. In a deviceof the class desoribeda mixing head adapted to churn aliquid 1n an upward and downward direction simultaneously.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

CHARLES ENDORF, JR.

Witnessesi CHARLES W. HILLS, Jr., GEORGE R. MOORE.

